body{
  background-color: #393d49;
  position: absolute;
  width: 100%;
  height: 100%;
}
#top{
  height: 40px;
  width: calc(100% - 200px);
  float: right;  
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#left_menu{
  width: 200px;
  height: 100%;
  background-color: #393d49;
  float: left;
}
#title{
  width: 200px;
  margin-top: 0;
  margin-bottom: 0;
  color: #FFFFFF;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;  
}
#user{
  width: 200px;
  margin-top: 0;
  margin-bottom: 0;
  color: #FFFFFF;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;  
}
#top_menu{
  width: calc(100% - 200px);
  background-color: #ffffff;
  height: 40px;
  float: right;
}
#main{
  width: calc(100% - 200px);
  height: calc(100% - 80px);
  background-color: #ffffff;
  padding: 30px;
  float: right;
  OVERFLOW: auto; 
}
